2026. Investigating the Impact of Substrate-to-Nozzle Distance on the Microstructure and Optical Properties of CuO Thin Films Deposited by Thermochemical Spray Technique: Investigating the Impact of Substrate-to-Nozzle Distance on the Microstructure . Rafidain Journal of Science. 35, 1 (Mar. 2026), 108–118. DOI:https://doi.org/10.33899/rsci.v35i1.61997.